KR102348833B1 - liquefied gas tank and ship having the same - Google Patents

Abstract

The present invention relates to a liquefied gas storage tank and a ship including the same. The liquefied gas storage tank comprises: a wall forming a storage space for accommodating a liquefied gas and having a dome formed on an upper surface for the inflow and outflow of the liquefied gas; and a pump tower having an upper end fixed to the dome and provided with a pipe for transporting the liquefied gas and a discharge pump for discharging the liquefied gas. The pump tower includes: a plurality of unloading pipes connected with the discharge pump and provided for unloading of the liquefied gas; an auxiliary pipe provided to back up the unloading pipe; a loading pipe provided on one side of the auxiliary pipe and provided for loading of the liquefied gas; a plurality of reinforcing materials for connecting the plurality of unloading pipes and the auxiliary pipes in a cylindrical prism shape; and a platform for connecting the plurality of unloading pipes and the auxiliary pipes in a cylindrical shape and provided at positions displaced from the plurality of reinforcing materials in a height direction. The reinforcing material is provided in the form of a donut penetrating the center, and the platform is provided in the form of a donut penetrating the center or in the form of a disk. The present invention can improve structural stability.

Description

Liquefied gas storage tank and ship including the same {liquefied gas tank and ship having the same}

The present invention relates to a liquefied gas storage tank and a ship including the same.

According to recent technology development, liquefied gas such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG) is widely used to replace gasoline or diesel.

LNG in ships that transport or store liquefied gas such as LNG at sea, LNG RV (Regasification Vessel), LNG FPSO (Floating, Production, Storage and Offloading), and LNG FSRU (Floating Storage and Regasification Unit) A liquefied gas storage tank (referred to as a "cargo hold") is installed to store the liquefied gas in a cryogenic liquid state.

A pump tower for the inflow and outflow of the liquefied gas is installed in this liquefied gas storage tank. The upper end of the pump tower is fixed to the dome of the liquefied gas storage tank, and the lower end is guided by a guide structure provided on the inner floor of the liquefied gas storage tank.

However, the pump tower is provided in a form extending vertically to correspond to the height of the liquefied gas storage tank, and contraction/expansion in the vertical direction may occur by the liquefied gas. In consideration of this, the guide structure may have a structure in which it is constrained in a horizontal direction with respect to the lower end of the pump tower and is allowed to move in an up-down direction.

That is, since the lower end of the pump tower is not fixed to the guide structure, the pump tower is substantially in a suspended form with only the upper end fixed to the dome, and structural stability may be a problem. Accordingly, various studies and developments for improving structural stability and the like for such a pump tower are in progress.

Laid-open Patent Publication No. 10-2019-0142938 (2019.12.30, published)
Unexamined Patent Publication No. 10-2017-0036178 (2017.04.03, published)

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to provide a liquefied gas storage tank including a pump tower capable of improving structural stability and the like, and a ship including the same.

A liquefied gas storage tank according to an aspect of the present invention comprises: a wall having a storage space for accommodating the liquefied gas and having a dome formed on the upper surface for the inflow and outflow of the liquefied gas; and a pump tower having an upper end fixed to the dome and provided with a pipe for transporting liquefied gas and a discharge pump for discharging liquefied gas, wherein the pump tower is connected to the discharge pump and for unloading of liquefied gas a plurality of unloading pipes provided; an auxiliary pipe provided to back up the unloading pipe; a loading pipe provided on one side of the auxiliary pipe and provided for loading of liquefied gas; a plurality of reinforcing materials connecting the plurality of unloading pipes and the auxiliary pipes in a cylindrical shape; and a platform provided at a position displaced from the plurality of reinforcing materials in a height direction to connect the plurality of unloading pipes and the auxiliary pipes in a cylindrical shape, wherein the reinforcing material is provided in the form of a donut having a penetrating center, the platform The silver is characterized in that it is provided in the form of a donut or a disk through which the center is penetrated.

Specifically, the platform and the reinforcing material may be provided with the same outer diameter.

Specifically, the platform may be provided in the form of a donut having a penetrating center, and an inner diameter of the platform may be provided relatively smaller than the inner diameter of the reinforcing material, thereby providing a relatively larger plane than the reinforcing material.

Specifically, the plurality of unloading pipes and the auxiliary pipe may be arranged at equal radial intervals with respect to the vertical center of the pump tower and provided in point symmetry.

Specifically, the pump tower may further include a reinforcing filler provided in parallel with the unloading pipe and the auxiliary pipe and connected to the reinforcing material and the platform.

A ship according to an aspect of the present invention is characterized in that it has the liquefied gas storage tank.

The liquefied gas storage tank and the ship including the same according to the present invention can improve the structure of the pump tower to increase the durability of the pump tower itself, simplify the structure, reduce manufacturing costs, etc., and ensure stable transport of liquefied gas. can

1 is a perspective view of a liquefied gas storage tank according to the present invention.
Figure 2 is a side view of the pump tower according to the first embodiment of the present invention.
3 is a front view of the pump tower according to the first embodiment of the present invention.
4 and 5 are plan views of the pump tower according to the first embodiment of the present invention.
6 is a rear view of the pump tower according to the first embodiment of the present invention.
7 is a side view of a pump tower according to a second embodiment of the present invention.
8 is a view for explaining the manufacturing process of the pump tower according to the second embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In the present specification, in adding reference numbers to the components of each drawing, it should be noted that only the same components are given the same number as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

For reference, the present invention includes a ship equipped with a liquefied gas storage tank to be described below. At this time, the ship may be a ship that uses at least liquefied gas as a propulsion fuel/power generation fuel, and it is a concept that includes all gas carriers, merchant ships that transport cargo or people other than gas, FSRUs, FPSOs, bunkering vessels, and offshore plants. .

1 is a perspective view of a liquefied gas storage tank according to the present invention, Figure 2 is a side view of the pump tower according to the first embodiment of the present invention, Figure 3 is a front view of the pump tower according to the first embodiment of the present invention 4 and 5 are plan views of the pump tower according to the first embodiment of the present invention. 6 is a rear view of the pump tower according to the first embodiment of the present invention.

Before describing each embodiment below, the liquefied gas storage tank 1 of the present invention will be schematically described with reference to FIG. 1 first.

Referring to FIG. 1 , the liquefied gas storage tank 1 of the present invention includes a wall 10 and a pump tower 20 .

The wall 10 forms a storage space for accommodating the liquefied gas. To this end, the wall 10 may form a storage space through at least six surfaces, and for example, the storage space may have an octagonal cross section.

In addition, the wall 10 may have a thermal insulation structure to protect the liquefied gas stored therein from evaporation due to heat penetration. For example, the wall 10 may have a double insulation structure and a double sealing structure.

Specifically, the wall 10 is a secondary heat insulating wall (not shown) provided on the hull side, a secondary barrier (not shown) provided inside the secondary insulating wall, a primary provided inside the secondary barrier It may have a structure including an insulating wall (not shown) and the primary barrier 11 provided inside the primary insulating wall.

In this case, the insulation wall may use an insulation block such as polyurethane foam, or an insulation box containing an insulation material such as perlite. In addition, for the barrier, a metal sheet such as SUS or INVAR, or a composite material mixed with aluminum and glass fiber, etc. can be used.

For example, the primary barrier 11 may be made of SUS, and may be provided with a wrinkled sheet in preparation for sloshing and the like. That is, the primary barrier 11 is a first direction (parallel to the longitudinal direction of the hull in the horizontal direction in FIG. 5) and a second direction perpendicular to the first direction (the width direction of the hull in a vertical direction in FIG. 5) Side by side) cross-arranged folds may be formed.

This wall 10, a dome (10a) for the inflow and outflow of liquefied gas is formed on the upper surface. An opening (not shown) is formed in the wall 10 constituting the upper surface of the storage space, a dome 10a protruding upwardly in the opening is provided, and a coaming (not shown) is provided in the dome 10a coaming. ) The opening may be closed while the cover (not shown) is seated.

At this time, the dome 10a cover is provided so that various pipes provided in the pump tower 20 to be described later pass through, and the liquefied gas is discharged from the storage space to the outside through the pipe passing through the dome 10a, or from the outside to the storage space. can be introduced into In addition, boil-off gas generated in the storage space may also be discharged to the outside through a pipe penetrating the dome 10a.

The pump tower 20 has an upper end fixed to the dome 10a and a pipe for loading and unloading liquefied gas. The pump tower 20 may be provided in the form of a column including pipes extending vertically from the dome 10a to the bottom of the storage space, and a truss structure that interconnects the pipes.

The pump tower 20 may be provided such that only the upper end is fixed to the dome 10a, and the lower end is not fixed. That is, the lower end of the pump tower 20 is provided so as not to be constrained at least in the vertical direction. This is to prepare for the pump tower 20 corresponding to the height of the storage space to contract/expand due to the cryogenic liquefied gas.

However, in order to ensure that the pump tower 20, whose upper end is fixed and the lower end is a free end, is placed stably, a rotary bearing 24 is provided on the wall 10 forming the bottom of the storage space and the lower end of the pump tower 20. can be provided.

The rotary bearing 24 permits vertical movement of the lower end of the pump tower 20, but restricts horizontal movement, thereby minimizing rotation or shaking of the pump tower 20.

Hereinafter, the pump tower 20 of the first embodiment will be described with reference to FIG. 2 and the like.

2 to 5, the pump tower 20 is provided to include a plurality of pipes. For example, the pump tower 20 includes an unloading pipe 21 , an auxiliary pipe 22 , a loading pipe 23 , a rotary bearing 24 , and the like.

The unloading pipe 21 is provided for unloading of the liquefied gas, and may be provided in plurality of at least two or more. For example, the pair of unloading pipes 21 may be provided to be mutually backed up.

A discharge pump 211 may be allocated to each unloading pipe 21 , and the discharge pump 211 is provided at a position displaced from the unloading pipe 21 in the vertical direction, and the lower portion of the unloading pipe 21 is After being bent obliquely toward the discharge pump 211 , it may be provided to be connected to the discharge pump 211 .

The auxiliary pipe 22 is provided to prepare for a case in which a problem occurs in unloading through the unloading pipe 21 , and may be referred to as an emergency pipe. In an emergency, after the emergency discharge pump is introduced into the auxiliary pipe 22, the liquefied gas in the storage space can be discharged to the outside through the emergency discharge pump. 21) A large contrast diameter may be provided.

Auxiliary pipes 22 are provided in a smaller number than the unloading pipes 21, for example, one may be provided. At this time, the pair of unloading pipes 21 and one auxiliary pipe 22 may be arranged in a triangle.

In particular, the pair of unloading pipes 21 and one auxiliary pipe 22 may be connected in a triangular prism shape by a reinforcing material 25 or the like, which will be described in detail below.

The loading pipe 23 loads the liquefied gas into the storage space. The loading pipe 23 may have a hollow shape with an open bottom in order to deliver the liquefied gas flowing in from the outside to the inner bottom of the storage space.

The loading pipe 23 is provided on one side of the auxiliary pipe 22 , and when the pair of unloading pipes 21 are triangularly arranged with the auxiliary pipe 22 , the loading pipe 23 is also a pair of unloading pipes (21) and can be triangularly arranged.

At this time, the loading pipe 23 may be disposed on the outside of the triangular prism formed by the pair of unloading pipes 21 and the auxiliary pipe 22, and the auxiliary pipe ( 22) can be fixedly installed.

That is, the loading pipe 23 may be provided at a position farther than the auxiliary pipe 22 from the vertical center C of the pump tower 20 , which is cryogenic liquefied gas flowing into the storage space through the loading pipe 23 . This is to protect the discharge pump 211 and the like from

The loading pipe 23 may be disposed to be spaced apart from the auxiliary pipe 22 by a predetermined distance or more, thereby more effectively protecting the discharge pump 211 from cryogenic liquefied gas.

The loading pipe 23 may be provided vertically without bending from an upper end connected to the dome 10a to a lower end adjacent to the bottom of the wall 10 . Since the loading pipe 23 should be prepared to prepare for the contraction of the liquefied gas, it was a stereotype that it was partially bent to implement a function such as an expansion loop.

However, in the present embodiment, the loading pipe 23 is provided vertically without bending from the inlet provided at the upper portion passing through the dome 10a to the outlet adjacent to the bottom of the wall 10 . This means that in the loading pipe 23 , the point where the upper part passes through the dome 10a and the point where the lower part supplies liquefied gas with respect to the bottom of the wall 10 may be located at the same position in the vertical direction.

Unlike the conventional liquefied gas carrier, this embodiment can be applied to a bunkering vessel or a liquefied gas propulsion ship. In this case, the liquefied gas storage tank 1 of this embodiment is a fuel tank/bunkering tank, and is more than a cargo tank of a liquefied gas carrier. It can have a low height.

Therefore, the loading pipe 23 of this embodiment applied to the bunkering tank, etc. is formed smaller than the length of the loading pipe 23 in the cargo tank, and the contraction displacement of the loading pipe 23 is also made smaller than the value in the cargo tank. .

That is, this embodiment is a pump tower 20 mounted on a fuel tank / bunkering tank rather than a cargo tank, considering that the amount of shrinkage displacement of the loading pipe 23 is reduced compared to the cargo tank, the bending part is placed on the loading pipe 23 Even if omitted, it is possible to implement stable support of the loading pipe 23 .

This loading pipe 23, the lower end may be constrained by the rotary bearing 24, which will be described later.

The pump tower 20 includes a gas sampling pipe (not shown), a level gauging pipe (not shown), and a discharge pump 211 in addition to the unloading pipe 21 , the auxiliary pipe 22 , and the loading pipe 23 as above. ) may include a cable pipe 27 for power/signal transmission, such as in various ways. However, the installation of the cable pipe 27 will be described later.

As such, the pipes provided in the pump tower 20 have the arrangement as shown in FIG. 5 . Referring to FIG. 5 , the first barrier 11 facing the liquefied gas in the wall 10 as mentioned above is provided in the first direction (horizontal direction in FIG. 5 = longitudinal direction of the hull). It has a corrugation 11a in the direction and a corrugation 11b in the second direction provided in the second direction (direction perpendicular to the width direction of the hull in Fig. 5), and the corrugation 11a in the first direction and the corrugation 11b in the second direction. ) are vertically intersected with each other and form a grid to form a plurality of intersections.

At this time, the plurality of unloading pipes 21 and auxiliary pipes 22 form a triangular prism, and the vertical center (C) of the triangular prism (= vertical center (C) of the pump tower 20) of the wall 10 It is provided to be placed on the wrinkle in the first direction provided on the floor.

In particular, the vertical center (C) of the triangular prism may be provided to lie on the intersection point where the first direction corrugation (11a) and the second direction wrinkle (11b) intersect, and furthermore, on the longitudinal centerline (CL) of the vessel can be placed.

Through this, in this embodiment, the vertical center (C) of the pump tower 20 is arranged at the center in the width direction of the ship, so that the movement of the lower part of the pump tower 20 during the rolling motion of the ship is minimized, so that the rotary to be described later It becomes possible to reduce the structural load of the bearing 24 .

In addition, the loading pipe 23 may be placed on a flat portion of the primary barrier 11 while the vertical center of the lower end is shifted from the corrugation in the first direction and the corrugation in the second direction. Since the lower end of the loading pipe 23 is a portion in which liquefied gas is poured downward, a large amount of liquefied gas is supplied to the wall 10 forming the floor during loading.

At this time, in this embodiment, when the liquefied gas is directly supplied to the curved wrinkled portion, the liquefied gas is scattered while colliding with the corrugation to reduce the possibility that the liquefied gas is vaporized, the liquefied gas is a flat portion of the primary barrier 11 to be transmitted to the top. Through this, the loading pipe 23 of this embodiment suppresses splashing of liquefied gas, and can reduce the amount of BOG to be processed during refueling.

In addition, the auxiliary pipe 22, the vertical center of the lower end may be placed on the corrugation in the first direction, specifically, the auxiliary pipe 22, the lower vertical center may be placed on the longitudinal center line (C.L.) of the vessel. That is, the pump tower 20 is an isosceles triangle (or equilateral triangle) in which the vertex formed by the auxiliary pipe 22 is parallel to the longitudinal centerline of the ship and the unloading pipe 21 is disposed on both sides of the longitudinal centerline of the ship. can have

The unloading pipe 21 may be provided such that the lower end covers the intersection where the first direction corrugation 11a and the second direction corrugation 11b intersect, but the lower vertical center of the unloading pipe 21 is at the intersection may be misaligned.

Specifically, referring to FIG. 5 , the unloading pipe 21 is spaced apart from the vertical center C of the triangular pole in the first direction based on the nearest intersection point at the vertical center of the bottom, and the vertical center of the bottom is spaced apart from the vertical center C of the triangular pole in the first direction. and, in the second direction, may be spaced apart in a direction closer to the vertical center (C) of the triangular prism.

In addition, the distance between the lower vertical center of the unloading pipe 21 and the intersection is the distance between the lower vertical center of the unloading pipe 21 and the lower outer diameter of the unloading pipe 21 (the lower radius of the unloading pipe 21) may be smaller than

As such, through the optimal arrangement of each pipe compared to the corrugation of the primary barrier 11, this embodiment ensures the durability of the primary barrier 11 and suppresses unnecessary evaporation of the liquefied gas to ensure stable flow/storage of liquefied gas can guarantee

The lower end of the pump tower 20 is provided to be constrained by the rotary bearing 24 . The rotary bearing 24 is provided on the wall 10 forming the bottom of the storage space, and is provided to restrict horizontal movement and allow vertical movement with respect to the lower end of the pump tower 20 .

The rotary bearing 24 may include an upper portion provided at the lower end of the pump tower 20 and a lower portion provided on the wall 10 , and the lower portion of the rotary bearing 24 is fixedly installed on the wall 10 . , The upper part based on the lower part is provided so that vertical movement is possible, but horizontal movement (including horizontal rotation) is limited.

A material (such as Teflon) that allows sliding of the rotary bearing 24 may be added to the surface where the lower part and the upper part face each other. In addition, the rotary bearing 24 may limit the horizontal movement of the upper part by providing the lower part in various shapes that are not limited, so that the lower part and the upper part contact each other at a plurality of points.

The rotary bearing 24 is provided to restrict horizontal movement and allow vertical movement with respect to the lower portion of the loading pipe 23 . In this case, the loading pipe 23 may be provided with a sliding material (such as Teflon) slidable on the outer surface constrained by the rotary bearing 24 .

The rotary bearing 24 constraining the horizontal movement of the loading pipe 23 may be an upper portion provided at the lower end of the pump tower 20 . Accordingly, the loading pipe 23 may have an upper portion fixed to the dome 10a, and a lower portion disposed adjacent to the wall 10 forming the floor, and only horizontal movement may be restricted by the lower portion of the pump tower 20 . In other words, the loading pipe 23 may be provided in a structure capable of additional contraction/expansion based on the unloading pipe 21/auxiliary pipe 22 .

The pump tower 20 further includes a reinforcement 25 and a platform 26 . The reinforcing material 25 connects the plurality of unloading pipes 21 and the auxiliary pipe 22 in the form of a triangular prism. The reinforcing member 25 may be integrated into a single column by connecting the plurality of unloading pipes 21 and the auxiliary pipe 22 in the horizontal direction.

Specifically, the reinforcing member 25 includes a plurality of horizontal members horizontally connecting the pair of unloading pipes 21 and the auxiliary pipe 22, but diagonal members connecting the horizontal members to each other may be omitted.

That is, in this embodiment, different from the truss structure of the pump tower 20 shown in FIG. 1 , the reinforcing member 25 may be made of only a horizontal member without a diagonal member. In this case, the reinforcing material 25 may connect the plurality of unloading pipes 21 and between the unloading pipes 21 and the auxiliary pipe 22 in a ladder shape.

As mentioned above while explaining the loading pipe 23, the liquefied gas storage tank 1 to which the pump tower 20 of this embodiment is applied may be a fuel tank or a bunkering tank of a bunkering vessel, in this case liquefied gas The height of the carrier may be lower than that of the cargo tank.

Therefore, since the height of the pump tower 20 is formed lower than that of the liquefied gas carrier, the present embodiment can secure structural stability even when all of the diagonal members are omitted from the reinforcing material 25 .

However, for the pump tower 20 with a lowered height compared to the liquefied gas carrier, when the slender equipment is taken the same as in the liquefied gas carrier, the inside of the triangular pole is narrowed. Therefore, in this embodiment, when applied to a bunkering tank of a bunkering vessel and a fuel tank of a liquefied gas propulsion ship, which has a lower height than the cargo tank of a liquefied gas carrier, the height of the pump tower 20 is reduced while maintaining the slenderness, and the reinforcement (25) ) can be provided with only a horizontal member, thereby simplifying the structure, and also changing the structure of the platform 26 as described below to sufficiently secure a working space.

The platform 26 is provided on at least a portion of the reinforcing material 25 , and implements a scaffold function on which an operator can stand. The platform 26 may be a type of deck member provided in a horizontal direction to support the operator.

The platform 26 may be provided inside the triangular prism formed by the pair of unloading pipes 21 and the auxiliary pipe 22 . However, as described above, when this embodiment is applied to a bunkering tank or fuel tank having a lower height compared to the cargo tank of the liquefied gas carrier, if the slenderness of the pump tower 20 is the same as in the cargo tank, the inner space of the triangular pole This becomes narrow and the area of the platform 26 becomes insufficient.

Therefore, in this embodiment, in order to secure the area of the platform 26, the platform 26 may be provided on the outside of the triangular prism. At this time, the inner platform 26a is provided on the inner side of the triangular pole, and the outer platform 26b is provided on the outer side of the triangular pole.

The inner platform 26a provided inside the triangular prism may be supported by the reinforcing material 25 (horizontal member) connecting the pair of unloading pipes 21 and the auxiliary pipe 22 . That is, the inner platform 26a has a triangular shape supported by the triangular stiffener 25 .

In addition, in order to provide the outer platform 26b on the outside of the triangular pole, an extension member 251 may be added to the outside of the reinforcing material 25 . The extension member 251 may extend outwardly from the reinforcing material 25 , and may be provided to extend outwardly from the unloading pipe 21 or the auxiliary pipe 22 in which the reinforcing material 25 is installed.

Specifically, the extension member 251 may be provided to extend from any one of the unloading pipe 21 and the auxiliary pipe 22 to support the outer platform 26b. Of course, unlike the drawing, it is also possible that the extension member 251 extends outward from the pair of unloading pipes 21 .

However, in the former case, the outer platform 26b is disposed between one unloading pipe 21 and the auxiliary pipe 22 , and in the latter case, the outer platform 26b is disposed between the two unloading pipes 21 . Accordingly, from the viewpoint of maintenance of the auxiliary pipe 22 , the arrangement of the extension member 251 such as the former may be preferable.

Of course, the extension member 251 may be provided to extend outwardly from both the pair of unloading pipes 21 and the auxiliary pipe 22 , and the outer platform 26b is disposed between the pair of unloading pipes 21 and It may be provided on the outside of the triangular prism between any one of the unloading pipe 21 and the auxiliary pipe 22 . That is, the arrangement of the extension member 251 and the outer platform 26b may be variously changed in consideration of the need for maintenance and the like.

A loading pipe support member 252 may be further provided on the outside of the reinforcement 25 . The loading pipe support member 252 may be provided to extend outwardly from the reinforcing material 25 , similarly to the extension member 251 , or to extend outwardly from the unloading pipe 21 / auxiliary pipe 22 . have.

For example, the loading pipe support member 252 may extend from the auxiliary pipe 22 to support the loading pipe 23 adjacent to the auxiliary pipe 22 as shown in the drawing. However, the loading pipe support member 252 may be provided to have a length of more than the aforementioned predetermined distance in order to protect the discharge pump 211 from the loaded liquefied gas.

However, in order to minimize the interference between the loading pipe support member 252 and the outer platform 26b, the loading pipe support member 252 has a different direction forming an obtuse angle with the direction in which the extension member 251 extends from the auxiliary pipe 22. It may be connected to the auxiliary pipe 22 to extend to.

In this case, based on the longitudinal centerline (C.L.) of the ship, the outer platform 26b is provided on one side of the auxiliary pipe 22 , and the loading pipe 23 may be provided on the other side of the auxiliary pipe 22 .

Of course, unlike the drawing, the loading line may be provided at a location that is easily accessible to an operator located on the platform 26 . That is, the loading pipe support member 252 extends from the unloading pipe 21 or the auxiliary pipe 22 in which the extension member 251 is provided to support the loading pipe 23 adjacent to the auxiliary pipe 22 . have.

At this time, the loading pipe support member 252 is extended in a direction forming an acute angle with the direction in which the extension member 251 extends from the unloading pipe 21 or the auxiliary pipe 22. The unloading pipe 21 or the auxiliary pipe ( 22) can be connected.

When the loading pipe support member 252 is provided in the unloading pipe 21, both the outer platform 26b and the loading pipe 23 are provided on one side of the unloading pipe 21 based on the longitudinal centerline of the ship. The loading pipe support member 252 and the extension member 251 extending from one unloading pipe 21 to one side may be provided to form an acute angle. At this time, the loading pipe 23 may be provided at the front (left side of FIG. 4 ) of the unloading pipe 21 and the outer platform 26b may be provided on the rear side (right side of FIG. 4 ) of the unloading pipe 21 .

Alternatively, when the loading pipe support member 252 is provided in the auxiliary pipe 22, both the outer platform 26b and the loading pipe 23 are provided on one side of the auxiliary pipe 22 based on the longitudinal centerline of the ship. However, the outer platform 26b is provided in front of the auxiliary pipe 22 (on the left side of FIG. 4 ), and the loading pipe 23 is provided on the rear side (the right side of FIG. 4 ) of the auxiliary pipe 22. .

That is, the loading pipe support member 252 is provided at various positions that do not interfere with the outer platform 26b and may be provided to support the loading pipe 23 , and extends from the unloading pipe 21 / auxiliary pipe 22 . It may be provided and/or provided to extend from the extension member 251 or the outer platform 26b.

As described above, the pump tower 20 of this embodiment may include a cable pipe 27 for power/signal transmission to electrical equipment provided under the pump tower 20 .

The cable pipe 27 is disposed inside or outside the triangular pole and may be supported by the reinforcing material 25 . For example, the cable pipe 27 is provided vertically on the outside of the triangular prism and is supported through the reinforcing material 25 to be spaced apart from the unloading pipe 21 to the outside.

If the reinforcing member 25 includes both a horizontal member and a diagonal member, the vertical cable pipe 27 is provided to intersect the horizontal member and the diagonal member, and a support gap smaller than the vertical distance between the horizontal members (between the horizontal member and the diagonal member) spacing) can be installed.

However, in the present embodiment, since the reinforcing member 25 is made without a diagonal member, the vertical cable pipe 27 has a support gap equal to the upper and lower spacing of the reinforcing member 25 .

In this case, the present embodiment may use the support bracket 271 in order to solve the concern that the support durability of the cable pipe 27 is lowered. The support bracket 271 is provided on the reinforcing material 25 and extends outwardly, and after extending upward or downward from the reinforcing material 25, it may have a shape that is bent or bent outward.

For example, a plurality of support brackets 271 are provided for one reinforcing material 25, one support bracket 271a extends upward and then forms a bent outwardly L-shape, and the other support bracket 271b ) can form an outwardly bent L shape after extending downward.

In this case, the cable pipe 27 is supported through the support brackets 271 installed on the reinforcing materials 25 , and the vertical spacing between the support brackets 271 may be formed to be smaller than the vertical spacing between the reinforcing materials 25 .

As an example, the cable pipe 27 goes upward at a certain height, and the L-shaped support bracket 271b provided on any one of the reinforcing materials 25, the L-shaped support bracket 271a provided on any one of the reinforcing materials 25, any one A support point is formed in the order of the L-shaped support bracket 271b provided on the other reinforcing material 25 placed directly above the reinforcing material 25 and the L-shaped support bracket 271a provided on the other reinforcing material 25 .

Therefore, in this embodiment, as the reinforcing member 25 omits the diagonal member, when the cable pipe 27 is supported by the reinforcing member 25, the vertical spacing between the supporting points (eg around 2,000 mm) is a preset value (eg, around 2,000 mm). 700 to 1,000 mm), by applying the support brackets 271, the vertical spacing of the support points can be lowered to within a preset value to realize stable fixing of the cable pipe 27.

Of course, the support point adjustment structure by the support bracket 271 may be applied to all of the gas sampling pipes provided vertically in addition to the cable pipe 27 .

As such, in this embodiment, the pair of unloading pipes 21 and the auxiliary pipe 22 constituting the triangular prism shape are optimally arranged compared to the wrinkles of the primary barrier 11, while the reinforcement 25 is a diagonal member The structure is simplified by making it possible without it, and it is possible to guarantee the work space of the operator by adding the outer platform (26b).

7 is a side view of a pump tower according to a second embodiment of the present invention, and FIG. 8 is a view for explaining a manufacturing process of the pump tower according to the second embodiment of the present invention.

Hereinafter, the present embodiment will be mainly described on the points that are different from the previous embodiment, and the parts omitted from the description will be replaced with the previous content.

7 and 8 , the pump tower 20 according to the second embodiment of the present invention may be provided in a cylindrical shape, unlike the first embodiment having a triangular prism shape. However, the arrangement of the unloading pipe 21 and the auxiliary pipe 22 may form a triangle in the same manner as in the previous embodiment. That is, the plurality of unloading pipes 21 and the auxiliary pipes 22 are arranged at equal radial intervals based on the vertical center C of the pump tower 20 and are provided in point symmetry.

In particular, in this embodiment, the distance from the vertical center C of the pump tower 20 to the plurality of unloading pipes 21 and the distance to the auxiliary pipe 22 may all be the same, and the platform 26 and The reinforcing material 25 may have a circular shape as a whole to have a cylindrical shape.

Specifically, the reinforcing material 25 connects the plurality of unloading pipes 21 and the auxiliary pipe 22 in a cylindrical shape, and is provided in the form of a donut having a penetrating center. The reinforcing material 25 is a horizontal member so that the unloading pipe 21 and the auxiliary pipe 22 are fixed to the circumference or a predetermined point adjacent to the circumference.

In addition, the platform 26 may be a horizontal member provided parallel to the reinforcing material 25 while being provided at a position displaced from the plurality of reinforcing materials 25 in the height direction. The unloading pipe 21 and the auxiliary pipe 22 may be connected in a cylindrical shape.

In this case, the platform 26 may have a donut shape through which the center is penetrated and may be provided in a shape similar to that of the reinforcing material 25 , or may be provided in a disc shape to support the operator.

The platform 26 and the reinforcing material 25 are provided with the same outer diameter, so that the pump tower 20 has a cylindrical shape without a change in diameter. In addition, both the platform 26 and the reinforcing material 25 are provided in a donut shape through which the center is penetrated, and the inner diameter of the platform 26 is provided relatively smaller than the inner diameter of the reinforcing material 25 , and is relatively larger than the reinforcing material 25 . can be prepared

Such a pump tower 20 is provided in parallel with the unloading pipe 21 and the auxiliary pipe 22 and may further include a reinforcing filler 253 connected to the reinforcing material 25 and the platform 26 . Therefore, this embodiment can form a shape similar to that of a circular concrete column structure in which reinforcing bars are embedded.

The pump tower 20 of this shape can be operated using the turning roller 30 . Referring to FIG. 7 , the pump tower 20 of this embodiment is seated on the turning roller 30 by the crane 40 ( 1 in FIG. 7 )), and the reinforcing material 25 or the platform by the turning roller 30 ) As 26 is supported, the pump tower 20 rotates with the vertical center C as a rotation axis by the rotational force of the turning roller 30 (2 in FIG. 7).

Therefore, in the pump tower 20 of this embodiment, since a manufacturing process such as assembly of a pipe is possible using the turning roller 30, workability can be significantly improved when compared to the case of using a fixed surface plate.

For reference, according to 3) of FIG. 7 , the reinforcing member 25 may further include a diagonal member (not shown) differently from the previous embodiment.

As such, in this embodiment, the pump tower 20 is in the form of a column to maintain stable structural strength, and also to simplify the equipment for the operation during the manufacturing operation.

Of course, the present invention may include a combination of at least any one or more embodiments and known techniques known to those skilled in the art, or a combination of at least two or more embodiments, as additional embodiments, in addition to the embodiments described above.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention It will be clear that the transformation or improvement is possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will become apparent from the appended claims.

1: liquefied gas storage tank 10: wall
10a: dome 11: primary barrier
11a: wrinkles in the first direction 11b: wrinkles in the second direction
20: pump tower 21: unloading pipe
211: discharge pump 22: auxiliary pipe
23: loading pipe 24: rotary bearing
25: reinforcing material 251: extension member
252: loading pipe support member 253: reinforcing filler
26: platform 26a: inner platform
26b: outer platform 27: full length pipe
271: support bracket 30: turning roller
40: crane

Claims (6)

a wall forming a storage space for accommodating the liquefied gas and having a dome formed on the upper surface for the inflow and outflow of the liquefied gas; and
It includes a pump tower having an upper end fixed to the dome and provided with a pipe for transporting liquefied gas and a discharge pump for discharging liquefied gas,
The pump tower is
a plurality of unloading pipes connected to the discharge pump and provided for unloading of liquefied gas;
an auxiliary pipe provided to back up the unloading pipe;
a loading pipe provided on one side of the auxiliary pipe and provided for loading of liquefied gas;
a plurality of reinforcing materials connecting the plurality of unloading pipes and the auxiliary pipes in a cylindrical shape; and
and a platform provided at a position displaced from the plurality of reinforcing materials in the height direction to connect the plurality of unloading pipes and the auxiliary pipes in a cylindrical shape,
The reinforcing material is provided in the form of a donut through which the center is penetrated,
The platform is provided in the form of a donut or a disk through which the center is penetrated,
The pump tower is
The liquefied gas storage tank, which is provided parallel to the unloading pipe and the auxiliary pipe, and further comprises a reinforcement filler connected to the reinforcing material and the platform. According to claim 1, wherein the platform and the reinforcement,
Liquefied gas storage tank, characterized in that provided with the same outer diameter. The method of claim 1,
The platform is provided in the form of a donut through which the center is penetrated,
The inner diameter of the platform is provided relatively smaller than the inner diameter of the reinforcing material, the liquefied gas storage tank, characterized in that providing a relatively larger plane than the reinforcing material. According to claim 1, wherein the plurality of unloading pipes and the auxiliary pipe,
Liquefied gas storage tank, characterized in that it is arranged at equal intervals radially based on the vertical center of the pump tower and is provided in point symmetry. delete A ship, characterized in that it has the liquefied gas storage tank according to any one of claims 1 to 4.

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